Question

how to find valecy and valece electro of element​

Answer 1

Here is ur ans....❤❤

The valency of an element can be said in 2 ways depending on its outer-most electron shell. First of all, the number of valence electrons (number of electrons in the outer-most shell) can be determined by either looking at the group (column number) in which the element is situated in the Periodic Table.

The most palpable method would be to refer to an element’s atomic configuration and simply count the electrons in the outermost shell. However, this would be an extremely tedious chore, since we might have to rummage through textbooks to seek out configurations with which we’re not familiar.

However, there’s no need to fret, as there’s a much simpler manner of finding this coveted number. This is a more generalized approach that only requires summoning one small resplendent rectangular sheet of paper — the periodic table. To find the number of valence electrons of an element, we must only refer to the periodic table and seek the element’s position within it.

Answer 2

if atomic no is given then do electronic configuration .
Valence Electron is the no of electrons in the last shell.
And if valence electron =1,2,3,4,5,6,7,8
Then valency =1,2,3,4,3,2,1,0 respectively
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